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VLT
®
8000 AQUA
•
Dry run protection. Shuts down at no or low flow
and protects the motor and pump from overheating.
•
Improved energy savings with Enhanced
sleep mode.
•
Minimized risk of bacterial growth in drinking water
because of insufficient motor cooling.
•
Easy commissioning.
•
Works together with the Danfoss cascade controller.
Only centrifugal pumps with radial impeller show
a clear one to one relationship between flow and
power. Consequently proper functionality of the
Enhanced Sleep Mode and Dry Run Detection is
only given for this type of pump.
463 Enhanced Sleep Mode Timer
(ESL TIMER)
Value:
Value 0 – 9999 sec.
✭
0 = OFF
Function:
The timer prevents cycling between Sleep mode and
normal operation. If for instance the power consumption
falls below the no/low flow power curve the frequency
converter will change mode when the timer expires.
Description of choice:
In case of cycling, set the timer to an appropriate
value that limits the number of cycles.
The value 0 disables Enhanced sleep mode.
Note: In parameter 406
Boost set point
it is possible to
set up the frequency converter to provide a pressure
boost before the pump is stopped.
NB!:
The value of this parameter must be set higher
than the value of
Dry Run Time Out
, par. 470.
Otherwise dry run trip will never occur.
464 Wakeup Pressure
(WAKEUP PRESSURE)
Value:
Par. 204 Ref
MIN
– par. 418 Setpoint 1
✭
0
Function:
When in Sleep mode the frequency converter
will wake up when the pressure is below the
Wakeup pressure for the time set in parameter
463
Enhanced sleep mode timer
.
Description of choice:
Set an appropriate value for the system. The
unit is set in parameter 415.
465 Minimum pump frequency
(PUMP MIN. FREQ.)
Value:
Value par. 201 f
MIN
– par. 202 f
MAX
(Hz)
✭
20
Function:
This parameter is linked to parameter 467
Minimum
Power
and is used for no/low flow power curve.
Description of choice:
Enter a value equal or close to the desired minimum
frequency set in parameter 201
Output frequency
low limit, f
MIN
. Please note, that the extension of the
no/low flow power curve is limited by parameters 201
and 202 and not by parameters 465 and 466.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.83.A2.02 - VLT is a registered Danfoss trademark
146